R 20-1999
Standard Recommended Practice for Procedures for Measuring Highway Noise (Nineteenth Edition; Revised Per Interim Specifications - Specifications - 1999)

Standard No.

R 20-1999

Release Date

1999

Published By

AASHTO - American Association of State Highway and Transportation Officials

Latest

R 20-1999

R 20-1999 history

• 1999 R 20-1999 Standard Recommended Practice for Procedures for Measuring Highway Noise (Nineteenth Edition; Revised Per Interim Specifications - Specifications - 1999)
• 1994 R 20-1994 Standard Recommended Practice for Procedures for Measuring Highway Noise